Actually:Delta and compact column formation have some weird behaviours, mainly the fact that your (or AI's) subordinates follow religiously the position in formation, without caring about taking cover. Moreover they often tend to go prone, that in an urban ambient is unrealistic for many reasons (less peripheral vision, limited movement and reaction possibility).

Obs:This leads to:-AI never taking cover-AI watching random directions in the attempt to follow the formation position (leader makes a single step left - all units turn left, step back - all units turns back)-when the squad is prone (they all go prone simultaneously), it takes a lot of times before they can stand up and catch up one by one. Combined with the previous behaviours it sometimes gives you the feeling you are commanding a squad of worms.

Exp:-AI units in delta and c. column formations should take cover as usually.-AI units in delta and c. column formations should avoid going prone, if not under fire or firing themselves (for better aim)

Little ending note: I think this could be applied even to staggered column, who is another formation used in close combat.

Ok, it's true that they move faster without doing bounding overwatch, but diamond formation is not the formation to save the squad from tanks, it's for leading the squad in urban terrain.The impossibility to have the squad moving fast has to be addressed in another place, but keep something broken just to fix something else that is broken, is not a good way of working.

EDIT: maybe the compact column can be left without bounding overwatch, since it's mainly used for very small squads and in stealth contests, or when you need your team close behind you.

EDIT2: I forgot that since about 77706 move orders disable bounding overwatch, so you clearly have your way to get your squad out of danger.

There are 2 problems (and one proposal of mine - for reworking them and making them differentiated from the rest of formations)

-Problem n.1: units in delta and compact column formation don't take cover at all, and don't use bounding overwatch; they just stay in formation behind you, always and perfectly.In my opinion units in delta formation should for sure move using bounding overwatch.Instead the compact column could be left without bounding overwatch, because it fits well for small squads that need compactness, stealth actions, sniper teams, ect.. (please give feedback about that)

-Problem n.2: units in delta and compact column formation tends to go prone too often (more often than they would usually do in other formations): if the leader stops for a few secs, the entire squad hit the ground simultaneously, and it takes a lot of time for them to stand up (if the leader moves slow enough they can even follow him crawling).

In this sense this ticket is pretty linked to #19156, beacuse the weird behaviour you see in #19156's repro is the same behaviour units have in delta and c. column formation, just applied to a wedge shape.

-(Additional) my proposal: make units in delta, compact column and staggered column (formations used in close combat) not to go prone at all by default, unless they are under fire, or firing themselves (for better aim); obviously this could be overriden by player ordering them to go prone, if needed.This has 2 positive consequencies (IMO):1) units takes a lot less to follow you/the leader, ensuring compactness of the team 2) units (even enemy units) in delta formation - so in an urban ambient - are not found anymore lying in places where they shouldn't for a lot of reasons (limited peripheral vision, limited reaction possibility, limited turning ability).Anyone of us have found at least 1 time a guy lying inside a house, who turns and shoots you with a impossible turning speed and precision (he's prone!).Please give me feedback on this last one.